Unit 2: Introduction to Mitosis Ch.6

Question 1

What is mitosis?

Answer 1

A process that divides a cell’s DNA evenly and produces two genetically- identical copies of itself.

Question 2

Why is mitosis essential for organisms?

Answer 2

• Asexual reproduction
• Growth and development of all organisms
• Wound healing and regeneration

Question 3

What is the purpose of mitosis?

Answer 3

To split up sister chromatids so each new cell gets complete copy of the original cell’s DNA.

Question 4

What are the stages of mitosis?

Answer 4

PP MAT

• Prophase
• Prometaphase
• Metaphase
• Anaphase
• Telophase

Question 5

What happens during a Mitosis: prophase?

Answer 5

• Chromatin condense into chromosomes
• Nuclear envelope breaks down
• Spindle fibers begin to form

Question 6

What happens during a Mitosis: Prometaphase?

Answer 6

Spindle Microtubules attach to the kinetochores of chromosomes.

Question 7

What happens during a Mitosis: Metaphase

Answer 7

Chromosomes align at the center of the cell.

Question 8

What happens during Mitosis: Anaphase?

Answer 8

Sister chromatids separate and move to opposite poles of the cell.

Question 9

What happens during Mitosis: Telophase?

Answer 9

• Chromosomes decondense.
• Nuclear envelope reforms around each set of chromosomes.

Question 10

What is a cytokinesis and how does it differ between animal cells?

Answer 10

• Cytokinesis: is the physical process of cell division, where the cytoplasm of a parental cell splits into two daughter cells.
• Animal cells: Cytokinesis involves a contractile ring of microfilaments that pinches the cell membrane inward, forming a cleavage furrow and eventually separating the cell.

Question 11

What is a cytokinesis and how does it differ between plant cells?

Answer 11

-Cytokinesis: is the physical process of cell division, where the cytoplasm of a parental cell splits into two daughter cells.

-Plant Cells: Plant cells have a rigid cell wall, so cytokinesis involves the formation of a cell plate in the center of the cell. The cell plate grows outward, eventually fusing with the existing cells walls and dividing the cell in two.